Fuel-control means for internal-combustion engines



1,624,69 1927' B. D. THOMPSON 3 FUEL CONTROL MEANS FOR INTERNAL COMBUSTION ENGINES Filed Aug. 27. 1926 lnvp ni 'or: Bucchand D. homp-son,

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JJ-nL Z B -Q A Q 'BENNSYWA IA- f f v ens-banter Mninvs non inriinuanoo vrnusrron i lveiivnsfi v Applioationfiled-Aug'ust 2?, 1-926;L=S eria1 110. 131 968.

Y 'YYY Thisinvention relateseto:meansfor inter;-

inittently Ef'eeding; fuel under pressure to an internal combustion engine: r

The principal j s 'of'the invention are i to. make the lifting of the inlet valve from its seat, positive and instantaneous" to com-j I pensate for wear-between .such operating Y Y invention appliedthereto.

parts, and to be able to vary the intermittent action ofthe valve lifting means as to the time of admission of fuel to the cornbustion chamber. V v

- To this end the invention comprises the novel arrangement; combination and construction of parts hereinafter described and shown in the accompanying drawings, in Which-.-

The figure is a view partly in section of an internalcombustion engine showing the vided with a detachable dome shaped head 3, secured thereto by bolts 4:. Y

..A nozzle 5 threaded or otherwise secured 7 to the wall of the dome 3 permit-sfuel to be protruding end or. the stem 7 is fitted with v angle thereto. This latter is engageable by a collar 9 and a spiral spring 10 surrounds this partof the valve stem, and bears agalnst v collar 9 and stuffing nut 8 thustendingto keep valve 6 on itsseat in closed position. The end 'of'thezvalvestem .7 beyond the collar 9 is bevelled, "and is engaged by ,a

wedge shaped cam 11,'carried on push rod 12 suitably supported from the cylinder as at 13. Cam 11, is slidably contained in an opening 145 offixture 15, attached to dome head 3 in any desired manner. Gain 11 is so proportioned inrelation to the space "1 1 that it is permitted a slight vertical movement upon being given an impact against the tension of the spring 10. 1

At the bottomof fixture 15 is provided a pivoted impact element having a contact arm 16 carrying a boss 17, and a trigger arm 18 extending at substantially a right An internal combustion engine-of the stationary type 1s shown dlagrammatically to consistof a combustion chamber 2 pro 1 light The a trip :19 supported eupon; rod 25 i in "a trip 19 to the left will; positively move the pivotal:mannerso that movement of the trigger ariin'qlS.butzmovement. toltheright trigger without moving the-latter. A block 20 is carried byan- .adjustment rod 21'slid- Y 23' will cause a corresponding 5 movement either 'to'theright or left of. the trip 19.

Rod25 maybe run from aneccentric off the 1 c'rankshaftor from a cam shaft in theusual manner, and as is Well known.

A spring 26-ma1nta1ns boss 17 "in contact With the under part of the cam111 so that i if when trip 19 passes ,to the left against trigger arm 18 and then beyond so as to clear the same, the spring 26'exerts its ten-f sion andtheboss is made to'sharply con tact with the cam 11. This'in turn imparts Y vertical move'ment to the inlet valve and admits a proper amount of-fuelv under v The rod 12'1nay through the instrumem tality of hand wheel 27 be made to enter or vpressure to the combustionchamber.

recede from the space 14 so as to insure con- .4

tact between thecam l1 and the-end'of the vvalve stem 7 i Obviously left willeither retard 'ing' of .the inlet valve; 1 1,

pressure through feed line' 28l from anydesired source and in any. desired manner.

Fuel may be supplied under requisite 90.'

w W y moving trip 19'toright or Y or advance thee-pen -Itwillbe noted that such instrumentalities as above described'jprovide for inter- 1 mitt'ent feeding "of fuel underpressure to thecombustlon chamber of such an engine where it is ignited-as for instance by a spark plug 29.

The means herein described providefor instantaneous lifting of the inlet valve to release the fuel held back thereby.

Obviously the tension of the spring 10 must be greater than the pressure used on the fuel line. Such instantaneous feeding of the fuel makes toward efficiencyofrvaporization, and combustion and therefore 'of engine operationandusefulness.j Y

I claim: Y Y

loo

1. In combination an internal combustion engine cylinder, means to supply fuel there to including an inlet valve held in closed position by means of a spring impact, means to lift said ralve from its seat, reciprocating means to intermittently. trip said impactmeans, said impact means including a cam movable across the axis of the valve stem and in contactwith said stem.

,2. In combination an internal combustion engine cylinder, meanstosupply fuel; thereto including an inlet valve held in closed position. meansof aspring'impact, means to 7 trigger arm, said trip engaging said trigger arm. to open said, valve. 7

3. In combination an internal! combustion engine cylinder, means to supply fuel thereto including an inlet "313 61 held in closed position by meansof a spring impact, means to lift said valve from its seat reciprocating means to intermittently trip said impact means, said impact means including a pivoted: member. having an impact arm and a trigger arm, said trip engaging intermittently said: trigger amnrr,v and means-7130. adjust the-"timeof contact between said trip and said trigger arms. 7 f In testim eny' WhereoiiI: aflix: my signature.

Di. THOMPSON. 

